Attachment for elevators



(No Model.) 2 Sheets-Sheet 1.

W. G. FAHY.

LOCKING ATTACHMENT FOR ELEVATORS.

. "No. 5'6'5;889. Patented Aug. 18, 1896.

WITN 49129 E E: M414 =2" (No Model.) 2 SheetsShet 2.

W. O. FAHY.

LOCKING ATTACHMENT FOR ELEVATORS.

No. 565,889. Patented Aug. 18, 1896 v UNITED STATES PATENT OFFICE.

WILLIAM C. FAHY, OF-PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY

MESNE ASSIGNMENTS, TO THE ELEVATOR SAFETY CONTROLLER COM- PANY, OF SAME PLACE.

LOCKING ATTACHMENT FORELEVATORSL SPECIFICATION V forming part of Letters Patent No. 565,889, dated August 18, 1896.

Application filed February 5, 1896- Serial No. 578,074- (No model.)

To all whom it may concern:

Be it known that I, WILLIAM G. FAHY, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Looking Attachments for Elevators, which improvement is fully set forth in the following specification and accompanying drawings.

My invention relates to elevators; and it consists of a novel construction of lockingattachinent, which is automatically operatedb y the opening and closing of the elevator-doors, whereby provision is made for locking the starting and stopping mechanism when said doors are open.

It further consists of a novel construction of locking devices for an elevator-door, which are automatically operated by the car, so that said door is held in locked position until the car reaches a predetermined point in its travel.

It further consists of novel details of construction, all as will be hereinafter set forth, and specifically pointed out in the claims.

Figure 1 represents a side elevation of an elevator-well provided with looking devices embodying my invention. Fig. 2 represents, on an enlarged scale, a side elevation of a portion of the mechanism whereby the looking device is actuated upon the movement of the door. Fig. 3 represents, on an enlarged scale, a side elevation showing the mechanism in the lower portion of the elevator-well for locking and unlocking the starting and stopping devices. Fig. 4 represents, on an enlarged scale, a side elevation of a portion of the actuating mechanism. Fig. 5 represents a side elevation of a portion of Fig. 4, showing the ratchet employed therein. Fig. 6 represents, on an enlarged scale, aside elevation of a modified form of door-actuating mechanism employed.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A designates an elevator-well,-the same being provided with the doorsB, which are hung and constructed in theusual manner. These doors serve as a support for certain new and useful devices j which form part of my invented device and will further be described in detail.

These devices form a portion of the means for actuatin g the locking mechanism, and since the construction of door and devices is substantially the same a description of one will suffice for all, reference being had to Fig. 2

and the upper portion of Fig. 1.

.connection whichis attached to each of said levers E, and which passes over the sheaves H, which are journaled at the upper portion of the elevator-well, said connection F after passingaround said sheaves I-I, being designated by the letter G. J designates an arm projecting from said connection F which has attached thereto one end of a spring K, the other end of the latter being secured to a suitable part of the wall of the elevator-well, as will be evident from Fig. 1.

L designates a pulley, which is mounted upon a rotatable shaft M, which is supported in the lower portion of the elevator-well, said shaft carrying a drum N, around which the ropes P and Q pass, the same also passing around the drum R, it being understood that the ropes F and G pass around the pulley L.

. In the preferred form of my invention I attach the connections F and G, respectively, to the pulleys H and L by means of the pins, screws, .or similar devices seen in Fig. 1, so that any movement imparted to any one of said connections will be positively transmitted to the other, the connections Q and P be ing attached, respectively, to the drums N and R in the same manner, as will be evident from the lower portion of Fig. 1.

No particular form of controllingmechanism is essential to my invention. In the form shown in the drawings, Q is attached to the end of the lever S, which is fulcrumedatthe point T to the frame T, as is best' seen in Figs. 1 and 3, the lower portion of said frame having journaled therein the shaft U, which has mounted thereon the pulley V, around which the controller-cables W pass, which latter are actuated by the attendant, by means of suitable intervening mechanism, from the elevator-car, and since the invention is lim ited to no special construction of actuating mechanism a detailed description of the same is omitted.

' Describing now a form of starting and stopping mechanism, W designates a lever or walking-beam which is mounted upon the shaft U, and is connected by means of the rods to suitable valve mechanism,whereby the elevator is started or stopped according to whichever end of the walkingbeam is elevated or depressed, the construction of said valve mechanism forming no part of the present invention and therefore does not need to be referred to in detail.

X and Y designate ratchet-wheels which are mounted upon the shaft U, said wheels being separated from each other by the partition Z, it being understood that the teeth of said ratchet-wheels are turned in opposite directions to each other when the parts are assembled, as will be evident from the dotted lines in the lower portion of Fig. 3.

A B designate pawls which are pivotally attached to or depend from the upper portion of the frame T, and have common thereto the spring 0, the tendency of which is to draw said pawls toward each other, whereby the extremities of the same are yieldingly urged into contact with the ratchet-wheelsX and Y.

D designates rollers mounted at substantially equal distances upon the lever S on each side of the fulcrum T, said rollers being adapted to contact with suitable portions of the pawls A B, whereby it will be seen that when said lever S is in an inclined position, as seen in Figs. 1 and 3, the pawls will be held in engagement with their respective ratchetwheels by the spring 0, but when said lever is rocked into the position shown in dotted lines in Fig. 3 the levers will also be caused toassume the position shown in dotted lines, and the pawls, and consequently the operating mechanism, can be readily actuated.

The operation is as follows: If we assume a door to be open, as indicated at B in Fig. 1, it will be seen that the contact of the roller D with the lever E has depressed the same, and by reason of the intermediate connections the lever S has moved into the position seen in full lines in Figs. 1 and 3, thereby allowing the spring O to draw the pawls A B toward each other into engagement with the ratchet-wheels X and Y, whereupon it will be seen that the shaft U cannot be operated by means of the controller-cables W in either direction, and the car is therefore held in fixed position so long as any of the doors remain open, as at 13*. If now the door is closed, the parts will assume the position shown in dotted lines in Fig. 3, since the spring K now exerts a pull on the connection F and causes, through the medium of the intermediate connections, the lever S to assume the position seen in dotted lines in Fig. 3, thereby throwing the pawls A B out of engagement with their respective ratchets X and Y, and the shaft U can now be readily rotated by the proper mechanism, and the walking-beam W its valve mechanism, and adjuncts can be operated in the desired direction to cause the ascent or descent of the car.

In Fig. 6 I have shown a modified construction of door-operated mechanism which may be. preferably employed in some locations, B designating the door as before, upon a suitable portion of which is mounted the roller 13 which engages the walls of the slot D in the bar E which is fulcrumed at F and has an arm G which is adapted to contact with a block H attached to the connection G, whereupon it will be seen that the opening or closing of the door will impart the desired movement to the mechanism in the well for operating the valves, the parts being restored by means of springs or similar devices.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of suitable starting and stopping mechanism for an elevator, a shaft for operating said mechanism, a series of elevator-shaft doors, a series of levers opposite said shaft-doors, means upon said shaft-doors .for operating said levers, a lock device having one of its members positively connected to said shaft so as to rotate therewith, and connections between said levers and the other member of said lock device substantially as described.

2. The combination of suitable starting and stopping mechanism for an elevator, a shaft for operating said mechanism, a series of ele vator-shaft doors, a series of levers opposite said shaft-doors, means upon said shaft-doorsfor operating said levers, a pawl-and-ratchet locking device having the ratchet portion positively secured to said shaft, and connections between said lever and the pawl member of the locking device, substantially as described.

3. In an elevator the combination of the elevator-shaft doors levers adapted to beoperated by the movement of said doors, the starting and stopping mechanism, a ratchetwheel connected with said starting and stopping mechanism, pawls adapted to engage said ratchet-wheel connections between said levers and said pawls and a spring tending to move said connections in one direction and the movement of said levers when acted upon by the doors moving said connections in the opposite direction substantially as described.

4. The combination of suitable stopping and starting mechanism for an elevator, a shaft for operating said mechanism, a series of elevator-shaft doors a locking device having a plurality of ratchet -wheels mounted upon TOO the shaft of said mechanism, pawls engaging with said ratchet-wheels, a spring adapted to hold said pawls, a lever suitably fulcrumed and having rollers contacting with said pawls and adapted to move the said pawls in and out of engagement with said ratchet-wheels, and means operated by said shaft-doors for rockin g said lever substantially as described.

5. The combination in an elevator locking attachment, of starting and stopping mechanism a pair of ratchet-wheels revolving together and having the teeth of one set in the reverse direction to the teeth of the other, said ratchet-wheels being connected with said starting and stopping mechanism pawls pivotally secured and provided with yieldinglyacting devices urging them into engagement with said ratchet-wheels and means acting positively upon said pawls to disengage them from said ratchet -wheels shaftdoors and means operated by said shaft-doors for operating the means acting positively upon the pawls substantially as described.

6. The combination, in an elevator locking attachment, of starting and stopping mechanism a pair of ratchet-wheels secured upon the shaft of said starting and stopping mechanism and secured to each other and having their teeth set in opposite directions a pawl for each ratchet-wheel, freely movable toward and away from same, means for yieldingly urging said pawls toward said ratchetwheels and means for positively withdrawing them from engagement with same, shaftdoors and means operated by said shaft-doors for operating the means for positively withdrawing the pawls from engagement with the same substantially as described.

7. The combination, in an elevator locking attachment, of starting and stopping mechanism a pair of ratchet-wheels having their teeth set in opposite directions, said ratchetwheels being connected with said starting and stopping mechanism a disk set between said ratchet-wheels of greater diameter than said ratchet-wheels, a pawl for each ratchet-wheel freely movable toward and away from same, a spring yieldingly impelling said pawls into connection with said ratchet-wheels and a lever pivoted between said pawls and provided with means for engaging with said {pawls whereby said pawls are moved positively away from engagement with said ratchet-wheels shaft-doors and means for operating said lever operated by said shaft-doors substantially as described.

8. The combination, in an elevator locking attachment, of starting and stopping mechanism a pair of ratchet-wheels secured to and moving with each other and having their teeth set in opposite directions, said ratchetwheels being connected with said starting and stopping mechanism a pawl for each ratchetwheel freely movable toward and away from same, a spring yieldingly impelling said pawls into connection with said ratchetwheels and a lever fulcrumed at a point between said pawls and provided with rollers engaging with said pawls whereby said pawls are moved positively out of engagement with said ratchet-wheels shaft-doors and means for operating said lever operated by said shaftdoors substantially as described.

9. The combination in an elevator device of starting and stopping mechanism a locking device set upon a shaft positively connected with said starting and stopping mechanism, a series of levers hung at the doors of the elevator-shaft, said shaft-doors, means placed upon said doors for engagement with said levers, a sheave at the top of the shaft, a flexible connection passing round said sheave and positively connected to said locking device, and to said levers, substantially as described.

WILLIAM G. FAHY.

Witnesses:

JOHN A. WIEDERsHEIM, E. HAYWARD FAIRBANKS. 

